“I was jumping, screaming. I went crazy,” said Kevin Lynch. “After the show was over, every single one of my neighbors was on the block. People are coming by, honking their horns.”

The new reality-competition series pits four families against each other nationwide. They each have 20 days to come up with the most elaborate Christmas decoration designs.

“For me to do this in three weeks was tough,” said Lynch, 55, a retired New York City firefighter. “It’s like running a marathon.”

The father of three covered his home at 166-04 23rd Avenue with a blanket of at least 300,000 lights — all with underground wires, no cords — and more than 100 animatronics. There is even a projected Santa Claus, waving from the second-story window.

“I lived on coffee and espresso. I didn’t even eat until 1 o’clock in the morning,” Lynch said. “By 1 o’clock, I was dead. I couldn’t move. I’d pass out, take the kids to school, come back and do lights.”

That became the routine from 8 a.m. to 2 a.m. for three straight weeks.